That's actually what makes me iffy on getting burrowing species as well. I love a lot of them (heaven knows how much I love the Skeleton tarantulas Ephebopus murinus, cyanognathus and uatuman) but the fact that they're obligate burrowers that I'll likely never even see has kind of put me off of them a bit. Not so much because I have a huge need to see them but that if anything goes wrong with the enclosure, I'll have a hell of a time having to dig them up to rehouse them and such :/